ACTIBIO will research and develop a completely new concept in biometric authentication: the extraction of multimodal biometric signatures based on the response of the user to specific stimuli, while performing specific but natural work-related activities. The novelty of the approach lies in the fact that the biometric measurements will correspond to the response of the person to specific events being however, fully unobtrusive and fully integrated in an Ambient Intelligence infrastructure. ACTIBIO will target a multimodal approach fusing information from various sensors capturing either the dynamic behavioural profile of the user (face, gesture, gait, body dynamics) or the physiological response of the user to events (analysis of EEG and ECG). ACTIBIO will also research the use of unobtrusive sensors, either wearable (in garments of uniforms to capture body dynamics) or integrated in the infrastructure (sensing seat sensors capturing the anthropometric profile of the user, sound-based activity recognition sensors, etc.). In this way ACTIBIO will develop novel activity related and soft biometrics technologies for substantially improving security, trust and dependability of "always on" networks and service infrastructures. The goal is to integrate biometric technologies in Ambient Intelligence security infrastructures in order to support continuous authentication and monitoring. Emphasis will be on the unobtrusiveness of the approach and the universal usage of such a system.The developments will be evaluated with the active involvement of users through several alternative realistic usage scenarios in three pilot sites:o\tSecurity operator pilot in the company indoor premises.o\tVehicle driver unobtrusive continuous authentication to prevent hijacking.o\tAuthentication via activity recognition and control in transactions through "always on" machines.